Journal of Virology, June 2001, p. 5684-5691, Vol. 75, No. 12
0022-538X/01/$04.00+0 DOI: 10.1128/JVI.75.12.5684-5691.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Institute of Cancer Biology and Immunology, Institut de la Santé et de la Recherche Médicale U.119, 13009 Marseille, France,1 and Department of Experimental Pathology, Section on Microbiology and Virology, University of Bologna, 40126 Bologna, Italy2
Received 23 January 2001/Accepted 18 March 2001
A novel member of the nectin family, nectin1
, was
molecularly cloned. The cDNA has the same ectodomain as
nectin1
and nectin1
, the two known transmembrane isoforms that
serve as receptors for herpes simplex virus (HSV) entry into human cell
lines (nectin1
and nectin1
, also called PRR1-HveC and HIgR,
respectively). The 1.4-kb transcript, which originated by
alternative splicing, is expressed in human cell lines, and appears to
have a narrow distribution in human tissues. The sequence does not have
a hydrophobic anchoring region, and the protein is secreted in the
culture medium of cells transfected with the cDNA. Nectin1
, purified
from culture medium, can compete with membrane-bound nectin1
and
reduce HSV infectivity. The expression of nectin1
cDNA in cells
resistant to HSV infection and lacking HSV receptors enables HSV to
enter the cell, which implies that it is present at the cell surface.
Thus, nectin1
has the potential both to mediate and to reduce HSV
entry into cells.
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